diff --git a/bitnami/spark/4.1/debian-12/Dockerfile b/bitnami/spark/4.1/debian-12/Dockerfile
index 000813c7b02e..5cedfdbf378b 100644
--- a/bitnami/spark/4.1/debian-12/Dockerfile
+++ b/bitnami/spark/4.1/debian-12/Dockerfile
@@ -8,7 +8,7 @@ ARG JAVA_EXTRA_SECURITY_DIR="/bitnami/java/extra-security"
 ARG TARGETARCH
 
 LABEL org.opencontainers.image.base.name="docker.io/bitnami/minideb:bookworm" \
-      org.opencontainers.image.created="2026-05-23T11:42:20Z" \
+      org.opencontainers.image.created="2026-06-01T09:55:53Z" \
       org.opencontainers.image.description="Application packaged by Broadcom, Inc." \
       org.opencontainers.image.documentation="https://github.com/bitnami/containers/tree/main/bitnami/spark/README.md" \
       org.opencontainers.image.source="https://github.com/bitnami/containers/tree/main/bitnami/spark" \
@@ -38,12 +38,12 @@ RUN --mount=type=secret,id=downloads_url,env=SECRET_DOWNLOADS_URL \
     for COMPONENT in "${COMPONENTS[@]}"; do \
       if [ ! -f "${COMPONENT}.tar.gz" ]; then \
         curl -SsLf "https://${DOWNLOADS_URL}/${COMPONENT}.tar.gz" -O ; \
-        curl -SsLf "https://${DOWNLOADS_URL}/${COMPONENT}.tar.gz.sha256" -O ; \
       fi ; \
-      sha256sum -c "${COMPONENT}.tar.gz.sha256" ; \
+      sha256sum -c "/opt/bitnami/checksums/${COMPONENT}.tar.gz.sha256" ; \
       tar -zxf "${COMPONENT}.tar.gz" -C /opt/bitnami --strip-components=2 --no-same-owner ; \
-      rm -rf "${COMPONENT}".tar.gz{,.sha256} ; \
-    done
+      rm -rf "${COMPONENT}".tar.gz ; \
+    done ; \
+    rm -rf /opt/bitnami/checksums ;
 RUN apt-get update && apt-get upgrade -y && \
     apt-get clean && rm -rf /var/lib/apt/lists /var/cache/apt/archives
 RUN chmod g+rwX /opt/bitnami
@@ -56,7 +56,7 @@ RUN /opt/bitnami/scripts/spark/postunpack.sh
 RUN /opt/bitnami/scripts/java/postunpack.sh
 ENV APP_VERSION="4.1.2" \
     BITNAMI_APP_NAME="spark" \
-    IMAGE_REVISION="1" \
+    IMAGE_REVISION="2" \
     JAVA_HOME="/opt/bitnami/java" \
     LD_LIBRARY_PATH="/opt/bitnami/python/lib:/opt/bitnami/spark/venv/lib/python3.12/site-packages/numpy.libs:$LD_LIBRARY_PATH" \
     LIBNSS_WRAPPER_PATH="/opt/bitnami/common/lib/libnss_wrapper.so" \
diff --git a/bitnami/spark/4.1/debian-12/prebuildfs/opt/bitnami/checksums/jre-17.0.19-11-1-linux-amd64-debian-12.tar.gz.sha256 b/bitnami/spark/4.1/debian-12/prebuildfs/opt/bitnami/checksums/jre-17.0.19-11-1-linux-amd64-debian-12.tar.gz.sha256
new file mode 100644
index 000000000000..5fa4e9253e4d
--- /dev/null
+++ b/bitnami/spark/4.1/debian-12/prebuildfs/opt/bitnami/checksums/jre-17.0.19-11-1-linux-amd64-debian-12.tar.gz.sha256
@@ -0,0 +1 @@
+f0c743ea17d6bb58c1d132dd5b96e1f2d94ef055a12bd0c769b737cd41df98d2  jre-17.0.19-11-1-linux-amd64-debian-12.tar.gz
diff --git a/bitnami/spark/4.1/debian-12/prebuildfs/opt/bitnami/checksums/jre-17.0.19-11-1-linux-arm64-debian-12.tar.gz.sha256 b/bitnami/spark/4.1/debian-12/prebuildfs/opt/bitnami/checksums/jre-17.0.19-11-1-linux-arm64-debian-12.tar.gz.sha256
new file mode 100644
index 000000000000..e904d564f5e4
--- /dev/null
+++ b/bitnami/spark/4.1/debian-12/prebuildfs/opt/bitnami/checksums/jre-17.0.19-11-1-linux-arm64-debian-12.tar.gz.sha256
@@ -0,0 +1 @@
+d77ed8eca85b273fcb7b3152712beda317ba6f080fff141fb1341e4640aade22  jre-17.0.19-11-1-linux-arm64-debian-12.tar.gz
diff --git a/bitnami/spark/4.1/debian-12/prebuildfs/opt/bitnami/checksums/nss-wrapper-1.1.16-0-linux-amd64-debian-12.tar.gz.sha256 b/bitnami/spark/4.1/debian-12/prebuildfs/opt/bitnami/checksums/nss-wrapper-1.1.16-0-linux-amd64-debian-12.tar.gz.sha256
new file mode 100644
index 000000000000..cf2734607b9e
--- /dev/null
+++ b/bitnami/spark/4.1/debian-12/prebuildfs/opt/bitnami/checksums/nss-wrapper-1.1.16-0-linux-amd64-debian-12.tar.gz.sha256
@@ -0,0 +1 @@
+af31040a9ef21924a1d4c6d3f0bd6a6be9ef701c9e726b9b3997b82394779b6e  nss-wrapper-1.1.16-0-linux-amd64-debian-12.tar.gz
diff --git a/bitnami/spark/4.1/debian-12/prebuildfs/opt/bitnami/checksums/nss-wrapper-1.1.16-0-linux-arm64-debian-12.tar.gz.sha256 b/bitnami/spark/4.1/debian-12/prebuildfs/opt/bitnami/checksums/nss-wrapper-1.1.16-0-linux-arm64-debian-12.tar.gz.sha256
new file mode 100644
index 000000000000..c4594d6aa7c5
--- /dev/null
+++ b/bitnami/spark/4.1/debian-12/prebuildfs/opt/bitnami/checksums/nss-wrapper-1.1.16-0-linux-arm64-debian-12.tar.gz.sha256
@@ -0,0 +1 @@
+9315fee0fbce2e445778f4cddd4b5a9ae657d40bcc4c9534430d8eaeecf7307c  nss-wrapper-1.1.16-0-linux-arm64-debian-12.tar.gz
diff --git a/bitnami/spark/4.1/debian-12/prebuildfs/opt/bitnami/checksums/python-3.12.13-11-linux-amd64-debian-12.tar.gz.sha256 b/bitnami/spark/4.1/debian-12/prebuildfs/opt/bitnami/checksums/python-3.12.13-11-linux-amd64-debian-12.tar.gz.sha256
new file mode 100644
index 000000000000..d8d64cc5e94a
--- /dev/null
+++ b/bitnami/spark/4.1/debian-12/prebuildfs/opt/bitnami/checksums/python-3.12.13-11-linux-amd64-debian-12.tar.gz.sha256
@@ -0,0 +1 @@
+a13e9f6ab18a719682fd94b0bdd131a771835c8cb707e2451c472a8b6927f3f7  python-3.12.13-11-linux-amd64-debian-12.tar.gz
diff --git a/bitnami/spark/4.1/debian-12/prebuildfs/opt/bitnami/checksums/python-3.12.13-11-linux-arm64-debian-12.tar.gz.sha256 b/bitnami/spark/4.1/debian-12/prebuildfs/opt/bitnami/checksums/python-3.12.13-11-linux-arm64-debian-12.tar.gz.sha256
new file mode 100644
index 000000000000..694ac13e1718
--- /dev/null
+++ b/bitnami/spark/4.1/debian-12/prebuildfs/opt/bitnami/checksums/python-3.12.13-11-linux-arm64-debian-12.tar.gz.sha256
@@ -0,0 +1 @@
+f79c0e2b0c9179091f9b06c650c757680b91a9f655538e85968cce732f150ab6  python-3.12.13-11-linux-arm64-debian-12.tar.gz
diff --git a/bitnami/spark/4.1/debian-12/prebuildfs/opt/bitnami/checksums/spark-4.1.2-0-linux-amd64-debian-12.tar.gz.sha256 b/bitnami/spark/4.1/debian-12/prebuildfs/opt/bitnami/checksums/spark-4.1.2-0-linux-amd64-debian-12.tar.gz.sha256
new file mode 100644
index 000000000000..f4e557905c54
--- /dev/null
+++ b/bitnami/spark/4.1/debian-12/prebuildfs/opt/bitnami/checksums/spark-4.1.2-0-linux-amd64-debian-12.tar.gz.sha256
@@ -0,0 +1 @@
+e521ec88de1c8fbd77386a08f681cfb8acedf1e67ac04cdb026f03a7aabdaa35  spark-4.1.2-0-linux-amd64-debian-12.tar.gz
diff --git a/bitnami/spark/4.1/debian-12/prebuildfs/opt/bitnami/checksums/spark-4.1.2-0-linux-arm64-debian-12.tar.gz.sha256 b/bitnami/spark/4.1/debian-12/prebuildfs/opt/bitnami/checksums/spark-4.1.2-0-linux-arm64-debian-12.tar.gz.sha256
new file mode 100644
index 000000000000..3fdd19f287f2
--- /dev/null
+++ b/bitnami/spark/4.1/debian-12/prebuildfs/opt/bitnami/checksums/spark-4.1.2-0-linux-arm64-debian-12.tar.gz.sha256
@@ -0,0 +1 @@
+c9947c37e32a9369123193ff4aa4afd11d1f1865b6f2d6e682eb2afa17eb7dc0  spark-4.1.2-0-linux-arm64-debian-12.tar.gz
diff --git a/bitnami/spark/4.1/debian-12/prebuildfs/opt/bitnami/scripts/libfile.sh b/bitnami/spark/4.1/debian-12/prebuildfs/opt/bitnami/scripts/libfile.sh
index 1c69e0e48a5d..335c1c7c9ef7 100644
--- a/bitnami/spark/4.1/debian-12/prebuildfs/opt/bitnami/scripts/libfile.sh
+++ b/bitnami/spark/4.1/debian-12/prebuildfs/opt/bitnami/scripts/libfile.sh
@@ -139,3 +139,40 @@ wait_for_log_entry() {
         return 1
     fi
 }
+
+########################
+# Creates a secure temporary file containing the provided secret
+# Arguments:
+#   $1 - secret to write to the temporary file
+# Returns:
+#   String
+#########################
+credential_to_temp_file() {
+    local secret="$1"
+    local tmp_file
+
+    # Use mktemp with a specific prefix for easier debugging if something lingers
+    if ! tmp_file=$(mktemp "${TMPDIR:-/tmp}/at.cred.XXXXXXXX"); then
+        echo "Error: Failed to create temp file" >&2
+        return 1
+    fi
+
+    # Restrict permissions before writing the secret
+    chmod 0600 "$tmp_file"
+    # Write secret and ensure it's flushed to disk
+    printf "%s" "$secret" > "$tmp_file"
+    # Output the filename so the caller can capture it
+    echo "$tmp_file"
+}
+
+########################
+# Cleans up temporary files created by credential_to_temp_file
+# Arguments:
+#   None
+# Returns:
+#   None
+#########################
+cleanup_credentials() {
+    debug "Cleaning up temporary files containing credentials"
+    rm -rf "${TMPDIR:-/tmp}"/at.cred.*
+}
diff --git a/bitnami/spark/4.1/debian-12/prebuildfs/opt/bitnami/scripts/libfs.sh b/bitnami/spark/4.1/debian-12/prebuildfs/opt/bitnami/scripts/libfs.sh
index 1337f6c2dd59..b16efabd3230 100644
--- a/bitnami/spark/4.1/debian-12/prebuildfs/opt/bitnami/scripts/libfs.sh
+++ b/bitnami/spark/4.1/debian-12/prebuildfs/opt/bitnami/scripts/libfs.sh
@@ -131,6 +131,7 @@ relativize() {
 #   -d|--dir-mode - mode for files.
 #   -u|--user - user
 #   -g|--group - group
+#   -n|--no-dereference - do not follow symlinks (use for runtime root chown of daemon-writable dirs)
 # Returns:
 #   None
 #########################
@@ -140,6 +141,7 @@ configure_permissions_ownership() {
     local file_mode=""
     local user=""
     local group=""
+    local follow_symlinks="yes"
 
     # Validate arguments
     shift 1
@@ -161,6 +163,9 @@ configure_permissions_ownership() {
             shift
             group="${1:?missing group}"
             ;;
+        -n | --no-dereference)
+            follow_symlinks="no"
+            ;;
         *)
             echo "Invalid command line flag $1" >&2
             return 1
@@ -169,22 +174,29 @@ configure_permissions_ownership() {
         shift
     done
 
+    # -L: follow symlinks and emits the target path
+    # This is dangerous at runtime, given a co-located lower-privileged process with write access
+    # to the target path can redirect the chown/chmod to arbitrary paths. Example:
+    # Lower-privileged process run: ln -s /etc /tmp/etc
+    # Then, setup.sh runs: configure_permissions_ownership --dir-mode 775 /tmp
+    local find_L_flag=(); [[ "$follow_symlinks" == "yes" ]] && find_L_flag=("-L")
+    # -h: changes symlink inode ownership without touching the target.
+    local chown_flags=(); [[ "$follow_symlinks" == "no" ]] && chown_flags=("-h")
     read -r -a filepaths <<<"$paths"
     for p in "${filepaths[@]}"; do
         if [[ -e "$p" ]]; then
-            find -L "$p" -printf ""
             if [[ -n $dir_mode ]]; then
-                find -L "$p" -type d ! -perm "$dir_mode" -print0 | xargs -r -0 chmod "$dir_mode"
+                find "${find_L_flag[@]}" "$p" -not -type l -type d ! -perm "$dir_mode" -print0 | xargs -r -0 chmod "$dir_mode"
             fi
             if [[ -n $file_mode ]]; then
-                find -L "$p" -type f ! -perm "$file_mode" -print0 | xargs -r -0 chmod "$file_mode"
+                find "${find_L_flag[@]}" "$p" -not -type l -type f ! -perm "$file_mode" -print0 | xargs -r -0 chmod "$file_mode"
             fi
             if [[ -n $user ]] && [[ -n $group ]]; then
-                find -L "$p" -print0 | xargs -r -0 chown "${user}:${group}"
+                find "${find_L_flag[@]}" "$p" -print0 | xargs -r -0 chown "${chown_flags[@]}" "${user}:${group}"
             elif [[ -n $user ]] && [[ -z $group ]]; then
-                find -L "$p" -print0 | xargs -r -0 chown "${user}"
+                find "${find_L_flag[@]}" "$p" -print0 | xargs -r -0 chown "${chown_flags[@]}" "${user}"
             elif [[ -z $user ]] && [[ -n $group ]]; then
-                find -L "$p" -print0 | xargs -r -0 chgrp "${group}"
+                find "${find_L_flag[@]}" "$p" -print0 | xargs -r -0 chgrp "${chown_flags[@]}" "${group}"
             fi
         else
             stderr_print "$p does not exist"
diff --git a/bitnami/spark/4.1/debian-12/rootfs/opt/bitnami/scripts/libspark.sh b/bitnami/spark/4.1/debian-12/rootfs/opt/bitnami/scripts/libspark.sh
index 57757b28fe78..c7cf39857cf3 100644
--- a/bitnami/spark/4.1/debian-12/rootfs/opt/bitnami/scripts/libspark.sh
+++ b/bitnami/spark/4.1/debian-12/rootfs/opt/bitnami/scripts/libspark.sh
@@ -94,6 +94,7 @@ spark_validate() {
 spark_generate_conf_file() {
     info "Generating Spark configuration file..."
     mv "${SPARK_CONF_DIR}/spark-defaults.conf.template" "${SPARK_CONF_DIR}/spark-defaults.conf"
+    chmod 600 "${SPARK_CONF_DIR}/spark-defaults.conf"
 }
 
 ########################